The dinitrogen molecule (N2) is an "unusually stable" compound, particularly because nitrogen forms a triple bond with itself. ... The compound is also very inert, since it has a triple bond. Triple bonds are very hard to break, so they keep their full valence shell instead of reacting with other compounds or atoms.

How does nitrogen become stable?

Nitrogen is one of a few elements that exists in a diatomic form. That is, its natural elemental form is two atoms bonded together. ... Thus this form of nitrogen is more stable than a single atom of nitrogen, which only has five valence electrons and must react with another chemical to become stable.

What is nitrogen stable?

The only two stable nitrogen isotopes are N147 and N157, which have seven protons each and seven or eight neutrons in their nucleus, respectively. N is the less frequent stable isotope, constituting of 0.365% of the global nitrogen pool [2].